In this thesis, the different methods for extracting of ephedrine and pseudophedrine from Herba Ephedrae were studied. The results showed that the ultrasonic wave method was the best one. Ephedrine and pseudophedrine were extracted by ultrasonic wave method and were determined with HPLC; The industrial solution for extracting ephedrine and pseudophedrine were studied; Inorganic Anions of Herba Ephedrae in different habitats of Xinjiang were determined by Single-Column Ion Chromatography; The essential oil w...